We automatically create a Leanpub account with every purchase by
someone who is not signed in, since our books are often published
The email address on an auto-created Leanpub account is as follows:
With a credit card purchase we ask for an email address and use that.
With a PayPal purchase we use the PayPal email.
So, if you subsequently signed up for a Leanpub account under a
different email address, you now have two Leanpub accounts!
Thankfully you can combine them :)
Here's how to do that, assuming you want to transfer the purchase from
the account we auto-created to the one you specifically signed up for.
Use our Merge Accounts feature at https://leanpub.com/user_dashboard/admin to transfer your purchases to the other account
More info is here: